114 MOLLUSCA OF THE GREAT OOLITE OF YORKSHIRE. 
Nerita psEupo-costata. Plate XV, figs. 3, 3a. 
Nerrra costata, Phillips. 1835. Geol. of York., vol. i, t. 11, fig. 32. 
_ — Morris. 1843. Catalogue, p. 154. 
—  psgEupo-costata, D’Orb. 1850. Prod. Paléont., p. 264. 
N. Testd parva, subhemisphericad ; spird parva, depressd; costis longitudinalibus, 
regularibus rotundatis et lavibus. 
Shell small, subhemispherical ; spire small and depressed ; ribs longitudinal, numerous, 
regular, rounded, and smooth. 
This shell appears to be identical with the well-known Inferior Oolite species. 
Occasionally there is some little irregularity about the coste, and they are not always so 
prominent as in the Yorkshire example. Size that of a moderate-sized pea. 
Locality. Near Scarborough; also in the Inferior Oolite of Yorkshire. (PAzllips.) 
Eviima tavieata, Plate XV, fig. 4. 
E.. Testé subulato-turrita, apice acuto ; anfractibus (11) subconvexis, obsolete costatis ; 
anfractu ultimo symmetrico. 
Shell subulate, turreted; apex acute; whorls (11) very slightly convex, smooth, or 
with slightly-marked cost ; the last whorl symmetrical. 
This little shell is very subulate, the length of the whorls being nearly equal to their 
transverse diameter. This character, and the degree of convexity, separates it from a shell 
very abundant in the Great Oolite at Mimchmhampton, which we have described under the 
title of Aulima communis. In that species the volutions are fewer, and the shell is more 
pyramidal. Length 7 lines. 
Locality. Neary Scarborough. 
CHEMNITZzIA? veTUSTA. Plate XV, fig. 7. 
TEREBRA VETUSTA, Phillips. 1835. Geol. of York., vol. i, t. 9, fig. 27. 
a _— Williamson. Geol. Trans., 2d Series, vol. v, p. 241. 
Cuemnitzia— D’Orb. 1850. Prod. Paleont., p. 263. 
C. Testa elongata, turritd ; anfractibus (9) subconvexis, longitudinaliter costatis ; suturis 
depressis ; costis circa 12, rotundatis levigatis curvatis. 
Shell turreted, volutions (9) rather convex, and longitudinally costated ; ribs, about 12 
in a volution, rounded and smooth, bent from left to right; the sutures of the volutions 
deeply impressed. 
